my_dict = {"name": "wangxing", "age": 24, "hight": 170.2}
print(my_dict)

my_dict['sex'] = '男'
print(my_dict)

my_dict['name'] = ('wangxin')
print(my_dict)


my_dict.pop('sex')
print(my_dict)

print(my_dict['name'])
print(my_dict.get('nasdfme'))


print(my_dict.keys())
print(my_dict.values())
print(my_dict.items())
